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Old 11-11-2003 | 10:35 AM
  #13  
JimTrainor
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From: Ontario, ON, CANADA
Default RE: What is CA glue?

Gus, that's a great link.
I've always wondered why water catalyzes CA glue. Further, I've read here that adding a bit of baking soda makes the water work even better. Now I know why:

"Cyanoacrylates ... are stabilized through the addition of a weak acid. When the adhesive contacts a surface, trace amounts of water or other species present on the surface neutralize the acidic stabilizer in the adhesive, resulting in the rapid polymerization of the cyanoacrylate "

I'll now toss my smelly CA accelerator and replace it with a water and baking soda solution.

That also explains why (I've read) people dust plywood with baking soda to improve CA bonding.
Plywood doesn't bond as well as balsa. It must be because it is slightly acidic.